Jaret Johnson has changed the defensive culture for the Chargers since signing as a free agent this spring.David Eulitt/Kansas City Star/MCT

Jarret Johnson came over to the Chargers this spring, coming as a free agent. Since he's gotten there, he's tried to change the defense's culture. "There used to be downtime for the Chargers defense in practice. It would jog off the field and to the sideline, rest and hydrate, rest and hydrate, standing around, waiting idly for its turn while the offense took reps. Jarret Johnson saw this in September. It hasn't happened again since," writes Michael Gehlken of the San Diego Union-Tribune.

Evidence of the rough day the Chargers had last Sunday? That two members of their defense were added as members to Pro Football Focus' 'Had a Bad Day' team for Week 15. It was not a good outing for Takeo Spikes and Corey Liuget.

Coming into this season, Darrelle Revis was the universal choice for best cornerback in the league. Once he went down, Antonio Cromartie named himself his successor -- with the backing of Rex Ryan. A pretty good argument could be made for the Bears' Charles Tillman or the Seahawks' Richard Sherman. Nope, Patrick Peterson has chosen himself.